Moss doesn't stop when your treatment expires. It starts re-establishing within weeks of the guarantee period ending if left untreated. In Victoria's Pacific climate, that re-growth cycle is faster than most homeowners expect.
Here's what Thomson's data from 40+ years of roof maintenance shows:
- A roof retreated on a schedule (every 1–2 years) stays in significantly better structural condition than one allowed to moss up between treatments.
- Retreatment on a clean, well-maintained roof takes less time and costs less than retreating a roof that's been left to re-establish moss.
- Clients who stay on the Maintenance Program consistently report that their roofs look newer and last longer than neighbouring homes of the same age.